test. final control diagnosis - vag linksaudi a6 sedan 1998-2004, audi a6 avant 1999-2004, audi...

Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

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01-80

Final control diagnosis

Note:

Final control diagnosis can only be performed with

the engine stopped and the ignition switched on.

During final control diagnosis the individual control

elements (except injectors) are actuated for approx.

1 minute or until key is pressed to select next

control element.

The control elements are checked acoustically or by

means of touch.

Final control diagnosis is terminated if the next step

is not selected after an actuation time of

approximately 1 minute, or if the engine is started or

an engine speed pulse is detected.

Prior to restarting the final control diagnosis, the

engine must be started and the ignition switched off

and on again.

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01-81

The final control diagnosis function actuates the

following components in the stated sequence:

1. Evaporative Emissions (EVAP) canister purge

regulator valve -N80- (fuel tank breather valve)

2. Secondary air injection solenoid valve -N112-

3. Secondary air injection pump relay -J299-

4. Wastegate bypass regulator valve

-N75-

5. Valve -2- for camshaft adjustment -N208-

6. Leak Detection Pump -V144-

7. Recirculating valve for turbocharger -N249-


8. Right Electro-Hydraulic engine mount solenoid

valve -N145-

(on right in direction of travel)

9. Left Electro-Hydraulic engine mount solenoid

valve -N144-

(on left in direction of travel)


01-82

10. Valve -1- for camshaft adjustment -N205-

11. Vacuum pump for brake system

12. Fuel pump 2 relay -J49-

(refer to note Page 01-95 )

13. Coolant fan actuation 2

14. Coolant fan actuation 1

15. Injector, cyl. 1 -N30-






01-83

Locations of control elements Page 24-5

Requirement

Fuses for engine electronics OK

Electrical Wiring Diagrams, Troubleshooting &

Component Locations

Work sequence

- Connect vehicle diagnostic, testing and information system VAS 5051 and select vehicle system "01 - Engine electronics" from list. Ignition must be on.


Indicated on VAS 5051:

- From list -1- select diagnostic function "03 - Final control diagnosis".


01-84

Actuation of EVAP canister purge regulator valve -

N80- (fuel tank breather valve)


A - Control element test waiting - Selection of next

step required

1 - EVAP caniste purge regulator valve -

N80-

- Touchkey.


A - Control element test in progress - Selection of next

step permitted

This valve is actuated intermittently (clicks) for

approximately 1 minute unless next control

element is selected beforehand by touching

key.

Note:

The two fuel pumps must run during the actuation

period. The flow noise is clearly audible at the fuel

pressure regulator. If the fuel pumps do not run, check


actuation Page 24-86 .

If valve is not actuated (does not click):

- Check EVAP caniste purge regulator valve -N80- Page 24-192 .


01-85

Actuation of Secondary air injection solenoid valve -

N112-

- Touchkey.



step required

2 - Secondary air injection solenoid valve -

N112-

- Touch key again.



step permitted

This valve is actuated (clicks) for approx. 1

minute if key is not touched beforehand to

select next control element.



- Check Secondary air injection solenoid valve -N112-:

Repair Manual, 4.2 Liter V8 5V BiTurbo Engine

Mechanical, Engine Code(s): BCY, Repair Group 26


01-86

Actuation of Secondary air injection pump relay -

J299-

- Touchkey.



step required

3 - Secondary air injection pump relay -

J299-

- Touch key again.



step permitted


Secondary air injection pump relay -J299- (in

relay carrier in plenum chamber electronics

box, refer to wiring diagram) intermittently

switches secondary air injection pump motor -

V101- on and off for approx. 1 minute if next

control element is not selected beforehand by

touching key.

If secondary air injection pump motor does not run

intermittently:

- Check Secondary air injection pump relay -J299-:




01-87

Actuation of Wastegate bypass regulator valve -

N75-

- Touchkey.



step required

4 - Wastegate bypass regulator valve -

N75

- Touch key again.



step permitted






01-88

Actuation of Valve -2- for camshaft adjustment -

N208-

- Touchkey.



step required

5 - Valve -2- for camshaft adjustment -

N208-

- Touch key again.



step permitted






- Check camshaft adjustment valve:




01-89

Diagnosis of Fuel System Leak Detection Pump

(LDP) -V144- actuation

- Touchkey.



step required

6 - Leak Detection Pump (LDP) -

V144-

- Touch key again.



step permitted

Switching valve in the LDP is actuated (clicks)

for approx. 1 minute if key is not touched

beforehand to select next control element.



- Check Leak Detection Pump (LDP -V144-:

Repair Manual, Fuel Supply System, Repair Group

15


01-90

Actuation of Recirculating valve for turbocharger -

N249-

- Touchkey.



step required

7 - Recirculating valve for turbocharger -

N249-

- Touch key again.



step permitted






- Check Recirculating valve for turbocharger -N249-:




01-91

Actuation of Right Electro-Hydraulic engine mount

solenoid valve -N145-

- Touchkey.



step required

8 - Right Electro-Hydraulic engine mount solenoid

valve -N145-

- Touch key again.



step permitted






- Check engine mount solenoid valve:




01-92

Actuation of Left Electro-Hydraulic engine mount

solenoid valve -N144-

- Touchkey.



step required

9 - Left Electro-Hydraulic engine mount solenoid valve -

N144

- Touch key again.



step permitted






- Check engine mount solenoid valve:




01-93

Actuation of Valve -1- for camshaft adjustment -

N205-

- Touchkey.



step required

10 - Valve -1- for camshaft adjustment -

N205-

- Touch key again.



step permitted






- Check camshaft adjustment valve.




01-94

Actuation of vacuum pump for brake system

- Touchkey.



step required

11 - Vacuum pump for brake

system

- Touch key again.



step permitted

Pump is actuated (clicks) for approx. 1 minute

if key is not touched beforehand to select

next control element.



- Check vacuum pump for brake system:

Repair Manual, Brake System, Repair Group 47


01-95

Actuation of Fuel pump 2 relay -J49-

- Touchkey.



step required

12 - Fuel pump 2 relay -

J49-

- Touch key again.



step permitted

Note:


The Fuel pump relay 2 -J49- is not an actual

component installed in the vehicle. The term "Fuel

pump 2 relay -J49-" refers to the wiring from the

engine control module to the fuel pump control

module, via which the engine control module

informs the fuel pump control module that full pump

output is required. Refer also to Page 24-93 .

During actuation of "Fuel pump 2 relay -J49-" the

engine control module switches off the actual fuel

pump relay.


01-96

Actuation of coolant fan control 2

- Touchkey.



step required

13 - Coolant fan actuation

2

- Touch key again.



step permitted

Coolant fan control module 2 -J671- (at front

of engine compartment) slowly increases

speed of coolant fan 2 (on left in direction of

travel) once to maximum unless key is

pressed beforehand to select next control

element.


If fan does not start up:

- Check coolant fan and Coolant fan control module 2 -J671-.


Component Locations


01-97

Actuation of coolant fan control 1

- Touchkey.



step required

14 - Coolant fan actuation

1

- Touch key again.



step permitted

Coolant fan control module -J293- (at front of

engine compartment, directly at fan, on right

in direction of travel) slowly increases speed

of coolant fan (on right in direction of travel)

once to maximum unless key is pressed

beforehand to select next control element.


If fan does not start up:

- Check coolant fan and Coolant fan control module -J293-.


Component Locations


01-98

Actuation of injectors

Note:

Injectors are actuated in line with firing order: Cyl.

1, cyl. 5, cyl. 4, cyl. 8, cyl. 6, cyl. 3, cyl. 7, cyl. 2

The following illustrates the procedure for the first

two injectors (cylinders 1 and 5). The procedure for

the remaining injectors (cylinders 4, 8, 6, 3, 7 and

2) is identical.

- Touchkey.



step required

15 - Injector, cylinder 1 -

N30-

- Touch key again.




step permitted

Injector must click five times after touching

key.

- Touchkey.


01-99



step required

16 - Injector, cylinder 5 -

N83-

- Touch key again.



step permitted

Injector must click five times after touching

key.

Continue until all eight injectors have been actuated.

If one of the injectors is not actuated (does not click):

- Check injectors Page 24-

68 .

- Touchkey.


01-100


A - Control element test

over

- End function "03 - Final control diagnosis" by touching key.

Note:

Prior to restarting final control diagnosis, engine must

be started and ignition switched off and on again.

test. final control diagnosis - vag linksaudi a6 sedan 1998-2004, audi a6 avant 1999-2004, audi...

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